ISS standard magnitude

From: Matson, Robert (
Date: Thu Aug 10 2000 - 10:22:03 PDT

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    > A good ISS pass across the N sky. Reached about mag 0 as opposed to a
    > 1.5 which was predicted by Rob's Skymap. For this program, standard
    > magnitudes are in satmag.dat. The standard mag for ISS (ZARYA, 25544) is
    > 2.5. I wonder if that should now be increased by 0.5-1.5 magnitudes, now
    > that the Zvezda module is attached?
    It should definitely be brightened with the addition of Zvezda.
    By how much, I haven't calculated.  And of course, as new modules
    are added to ISS, the standard magnitude number will continue
    to decrease (i.e. increase in brightness).  For a "quick fix", I
    think a decrease from 2.5 to 2.0 can't hurt.  This is a little
    shy of a 60% increase in brightness.  --Rob
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